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Jackson Industries uses a standard cost system in which direct materials inventory is carried at standard cost. Jackson has established the following standards for one unit of product: Direct materlais 4 pounds $430 per pound Directlabor 2.60 hours $7.00 per hour During May. Jackson purchased 107.250 pounds of direct material at a total cost of $52 5.525. The (trial factory wages for May were $465,100, 90 percent of which were for direct labor. Jackson manufacmred 23,000 units of product during May using 88,500 pounds of direct material and 50.300 direct laborahours. The labor rate variance for May is: 0 $3,510 Favorable 0 $2,310 Unfavorable 0 $3,510 Unfavorable 0 $1,110 Favorable